Given below are different properties of 3D projections from A-D. Identify the correct order on the basis of property true of (i) a perspective projection only, (ii) an orthographic projection only, (iii) both orthographic and projective transformations and (iv) neither orthographic nor projective transformation, respectively.

(A) Straight lines are mapped to straight lines.

(B) Distances and angles are (in general) preserved.

(C) Far away objects appear the same size as closer ones.

(D) Requires homogeneous coordinates in order for it to be encoded into a linear transformation.

Choose the correct answer from the options given below:

1. AD, C, B, A
2. BB, C, D, A
3. CD, C, A, B
4. DC, D, B, A

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: C. D, C, A, B

Explanation

Only perspective needs homogeneous coordinates to be written linearly (D); only orthographic keeps far objects the same size (C); both map straight lines to straight lines (A); neither preserves distances and angles in general (B).